Measuring function execution time in R

Question

Is there a standardized way in R of measuring execution time of function?

Obviously I can take system.time before and after execution and then take the difference of those, but I would like to know if there is some standardized way or function (would like to not invent the wheel).

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I seem to remember that I have once used something like below:

somesysfunction("myfunction(with,arguments)")
> Start time : 2001-01-01 00:00:00  # output of somesysfunction
> "Result" "of" "myfunction"        # output of myfunction
> End time : 2001-01-01 00:00:10    # output of somesysfunction
> Total Execution time : 10 seconds # output of somesysfunction

Answer 1

Another possible way of doing this would be to use Sys.time():

start.time <- Sys.time()
...Relevent codes...
end.time <- Sys.time()
time.taken <- end.time - start.time
time.taken

Not the most elegant way to do it, compared to the answere above , but definitely a way to do it.